Suction-cleaning apparatus.



No. 878,109. PATENTB'D FEB. 4, 1908.- E. K. A. BAUMANN & P. W. SEYB'OTH. SUCTION CLEANING APPARATUS.

APPLICATION FILED MAR. 21, 1907.

2 SHEETS-SHEET 1.

- PATENTED FEB. 4 1908'. E. K. A. .BAUMANN & F. W. SEYBOTH.

SUCTION CLEANING APPARATUS.

APPLICATION FILED MAR. 21, 1907.

2' SHEETS-SHEET 2.

Wii'ne ses:

UNITED STATES PATENT OFFICE.

ERNST KARL ALEXANDER BAUMANN AND FRIEDRICH WILHELM SEYBOTH, Ol

' ZWICKAU, GERMANY.

sUoTroN-cLEAmNG APPARATUS.

C Specification of Letters Patent.

Patented Feb. 4, 1908.

Application filed March 21 1907. Serial No. 363.537.

To all whom it may concern:

Be it known that we, ERNsT KARL ALEX- ANDER BAUMANN and FRIEDRICH WILHELM SEYBOTH, subjects of the Emperor of Germany, and residents of Zwic (an, Saxony, Germany, have invented a certain-new and useful Improvement in Suction Cleaning Apparatus, of which the following is a speciiication. i

This invention relatesto suction cleaning apparatus of the kind in which manually actuated bellows are employed to produce the suction.

The invention has for its primary object to provide a construction of such apparatus which is made of wood, both cheap and light and can be used both as a dust extractor and as an article of furniture such as a bench, stool, chair or table, the dust collector being arranged beneath the 'hinged seat.

A. further object is to provide in such apparatus an improved dust collecting box whereby all the dust will be removed from the air before it reaches the bellows.

The invention is illustrated in the accompanying drawing in which Figure l is. a part vertical section part elevation showing a combined dust extractor and stool. Fig. 2 is a part section showing the improved dust collecting box.

As shown in Fig. 1, the suction tube 1 is connected with the dust collecting chamber 2 formed by the frame 3 and the bellows 4. The bellows 4- is double acting with two compartments 5, 6, the suction valves of which are connected with the dust collecting chamber 2 by pipes 7 and 8, while the pressure valves are directly connected with the atmosphere by means of pipes 9, 10. This representation is diagrammatic only. instead of pipes passages would be cut in the wooden frame. The bellows may be actuated continuously by a treadle or handle 11, and the helical spring 12. On upward movement of the treadle in the direction of the arrow shown in full lines air is sucked into the compartment 6 of the bellows out 'of the collecting chamber 2 through the pipe or passage 8. There is thus produced a vacuum in the said chamber 2, so that the outer air passes through the tube 1 into the chamber 2. The dust carried by the air falls by the action of gravity on the bottom of the chamber 2. At the same time air is forced out of 1 the compartment of the bellows through the air to be entirely freed from dust.

Inpractice the pipe 9 into the atmosphere. The current is shown by the arrows in full lines. On pressing down the treadle in the direction of the arrow drawn in dotted lines the current is reversed, asshown by the arrows drawn in dotted lines. The air sucked from the chamber 2 passes through the pipe 7 into the compartment of the bellows, while at the same time the air in the compartment 6 escapes from the valve through the opening 10 into the atmosphere.

In the embodiment shown in Fig. 2 there is arranged in the dust collecting chamber 2 a removable dust collecting box which enablIes n the lower part which is not shown in section is the suction apparatus, which for instance may consist in known manner of double act-' ing bellows actuated by a treadle 11. The air sucked up which passes through the suction valve 13 into the bellows and thence again into the atmosphere must onentering the suction valve be already freed from dust. Into the dust collecting box passes the dust laden air sucked up through the tube 1 flowing downwardly. It strikes the inclined bottom surface of the collecting box and passes in the direction of the arrow 14 downwardly therein. In consequence of the large cross sectional area of the collecting box the movement of the air is already retarded so that the greatest part of the dust which slides downwardly on account of its weight settles in the corner 15 of the dust collecting box which is provided with an inclined base. Should by the slight movement of the air any dust particles be carried by it in the direction of the arrow 16, these are caught by the overturned edges of the box which form a circular arch, so that they receive a further movement in the direction of the arrow 17, again descend on account of their weight and are prevented from leaving the box. A similar operation is under one by those dust particles which are mover on account of the circulation of the air in-the direction of the arrows 1S and 19. They fall lirst into the upper corner of the inclined bottom and slide along the same back into the corner 15. The air freed from dust now passes in the direction of the arrows and 21 out of the dust collecting box, in order to pass in the direction of the arrows 25 and 26' to the suction valve. In order now to retain any iine mealhke dust particles which may IOQ still be contained in the air the upper opening ofthe dust collecting box is not free but is closed by a thin filter cloth 23 which issuitably clam ed to the cover 3 and weighted, at its edgewit a frame 24 restin on the circular arch as shown, Thr ought 's filter 23 the air must pass so that ,alsothe last and finest particles of dust arev caught thereby, As ;the aihbefor its passa e throughuthe filter is almost entirely free "from dust the filter will not be choked in a short time as happens when cloth'filters. alone are emplfiyed, so'that the resistance of the filter w' always remain small and effective suck-w in up of the dustxwill be ossible. The dust c0 ecting box is desirab y'provided at the" lowest part of'the same, atthe ,corner 15,1,

t]; n openin '27 to enable the dust to be readily remove 1 Having now described our invention what we claim and desire to secure by Letters Pat- I ent of the United States'is:

1. IIhe improved suction cleaning apparatus, comprising, in combination, a stool hav mg a hinged seat, a dust collecting chamber having a downwardly sloping base disposed .roof,"and manually- 'below' said seat, and manually actuated double-acting bellows fitted below said chan1- bar; and having passages for receiving in flowing air and discharging the air, substantially as described; v

; 2. Theimproved suction cleaning apparatus',"compr1sm'g,"1ncoinbination, a stool hav ing a hingedseat,a-dust collecting box 10-. Gated.Vbel'ow said seat and having a down- .wardly sloping' base and a roof 'formedwith fan annulararch a filter cloth closing the spelling. of the box, a frame stretching said ERNST: KARL ALEXANDER BAUMA'NN. FRIEDRICH WILHELM SEYBOTH.

Witnesses:

THOMAS H. NORTO I R. RICHTER. 

